JPH0160912B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electromagnetic coupling type electric equipment device mainly used for home use.

Conventional configurations and their problems Various devices of this type have been proposed in the past, but
There were questions about its safety. For example, when it comes to electromagnetic cookers, even if a container other than the specified cooker is brought close to the cooker, it generates heat, potentially creating a risk of fire or burns.

OBJECTS OF THE INVENTION The electromagnetic coupling type electrical device of the present invention aims to eliminate these drawbacks and dramatically improve usability.

Structure of the Invention The electromagnetically coupled electrical equipment device of the present invention includes a main body portion and a device portion that are configured to be freely separable, and the main body portion includes an inverter, a first coil excited by the inverter, and a first coil that controls the inverter. The device section consists of a comparison amplifier and a second coil provided as an input to the comparison amplifier, and the equipment section includes a third coil and a load connected to it, a battery, a switch, a second inverter, and a fourth coil. It consists of a transmitter consisting of a coil and a
When the main body part and the equipment part face each other, the first coil and the third coil, and the second coil and the fourth coil face each other, and the main body part The device can be driven only when a predetermined device is brought close to the device.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a main body, which includes a first inverter 12 connected to a commercial power source 11, and a first coil 1 excited thereby.
3, and the second coil 15 and this second coil 1
5 and a comparison amplifier 14 which compares and amplifies the signals of No. 5 and controls the inverter 12.

Reference numeral 2 denotes an equipment section that is separable from the main body section 1, and includes a third coil 21 provided to face the first coil 13, a load 22 such as a motor and a heater connected to this, and It consists of an oscillator composed of a fourth coil 26 disposed opposite to the second coil 15, a second inverter 25 for exciting the fourth coil 26, a switch 24, and a battery 23.

FIG. 2 shows a state in which a mixer is used in combination with the main body part 1 as the equipment part 2, focusing on the coils 13 and 21, and 27 indicates a mounting plate on the upper surface of the main body part 1.

In the above configuration, when in the state shown in the figure,
Although the main unit 1 and the equipment unit 2 are not driven, when the switch 24 of the equipment unit is closed, first the second inverter 2
5 oscillates and excites the fourth coil 26. This generates an induced voltage in the second coil 15, which is amplified by the comparator amplifier 14, and if the voltage exceeds a predetermined value, it instructs the inverter 12 to oscillate, and the first coil 13 is excited. , the third concatenated with this
Electric power is supplied to the load 22 via the coil 21 of.

When the switch 24 is closed, the second coil 15
The induced voltage disappears, the comparison amplifier 14 stops the oscillation of the inverter 12, and the current supply to the load 22 is cut off. The operation is controlled as described above, and here, the inverter 12
and the oscillation frequency are set to different frequencies to prevent mutual interference. Also, comparison amplifier 14
In order to make the oscillation output of the inverter 25 as weak as possible and reduce radio wave interference to other equipment, the second
Although this amplification section is provided to amplify the minute voltage induced in the coil 15, this amplification section can be omitted in some cases. Note that if the load 22 in the equipment section 2 is a motor, it may be driven with a voltage converted to direct current via a rectifier.

Effects of the Invention As described above, the present invention provides an oscillator in the fuselage,
A detection coil that is inductively coupled to the detection coil is provided in the main body, and the inverter in the main body is controlled by a signal from the detection coil, and has the following effects.

1. The main body is driven only when a specific device is installed in the main body, so it is safe and there is no unnecessary power consumption.

2. Operation is stopped even by removing the equipment, so it is safe and there is no wasteful power consumption.

3. Easy to operate because the operating section is located on the device side, which is the functional section.

4 Operation control is based on an electromagnetic induction coupling method, and coupling will not occur unless they are close to each other, so power can be transferred and received in the most efficient state in close proximity between the main body and the fuselage.
It is highly efficient and has little unnecessary leakage of electromagnetic waves (which cannot be achieved with signal coupling methods using radio waves).

5 The switch can be replaced with a time switch to allow automatic operation, further improving usability.

6. The equipment section does not require a cord to connect to the power source, making it extremely convenient to move and store.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram of a device according to an embodiment of the present invention;
FIG. 2 is a partial sectional view showing an example of how the mixer is used. DESCRIPTION OF SYMBOLS 1... Main body part, 2... Equipment part, 11... Commercial power supply, 12... First inverter, 13... First coil, 14... Comparison amplifier, 15... Second coil, 21...Third coil, 22...Load, 2
3...Battery, 24...Switch, 25...Second inverter, 26...Fourth coil.

Claims (1)

[Claims] 1 Consists of a main body section and a device section that are configured to be freely separable, and the main body section includes an inverter, a first coil excited by the inverter, a comparator amplifier that controls the inverter, and a comparator amplifier that controls the inverter. The device section consists of a second coil provided as an input, and a third coil, a load connected to this, and an oscillator consisting of a battery, a switch, a second inverter, and a fourth coil. , an electromagnetically coupled electric equipment device, wherein when the main body part and the equipment part face each other, the first coil and the third coil face each other, and the second coil and the fourth coil face each other. .